9738973997 has 2 divisors, whose sum is σ = 9738973998. Its totient is φ = 9738973996.

The previous prime is 9738973913. The next prime is 9738974009. The reversal of 9738973997 is 7993798379.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9534741316 + 204232681 = 97646^2 + 14291^2 .

It is a cyclic number.

It is not a de Polignac number, because 9738973997 - 2²⁸ = 9470538541 is a prime.

It is a super-2 number, since 2×9738973997² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9738973997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9738973597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4869486998 + 4869486999.

It is an arithmetic number, because the mean of its divisors is an integer number (4869486999).

Almost surely, 2^9738973997 is an apocalyptic number.

It is an amenable number.

9738973997 is a deficient number, since it is larger than the sum of its proper divisors (1).

9738973997 is an equidigital number, since it uses as much as digits as its factorization.

9738973997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162030456, while the sum is 71.

The square root of 9738973997 is about 98686.2401604195. The cubic root of 9738973997 is about 2135.5237320079.

The spelling of 9738973997 in words is "nine billion, seven hundred thirty-eight million, nine hundred seventy-three thousand, nine hundred ninety-seven".